Distinguish And Development Influence Factor Of The Volcanic Reservoir In The One Paragraph Of The Yingcheng Formation In Changde Gas Field

As one of the most complex and complicated oil and gas reservoirs,volcanic rocks have been highly concerned by domestic and international petroleum geologists.At present,the majority of domestic and foreign scholars have done a lot of research on the volcano rock reservoir basin in the world,the volcano volcano rock classification,lithofacies,lithology,rock and volcano volcano rock reservoir type,volcano rock reservoir space characteristics and achieved breakthrough results and understanding,but the exploration and development of volcanic reservoirs oil and gas is still in its infancy,there are some problems in the long geology need further research.This study has great contribution to the value of camp a volcano rock reservoir evaluation of Changde gas field of volcano rock reservoir pore structure back and permeability effectiveness evaluation,exploration and development of the volcano rock reservoir has an important instructive role.Well logging,seismic,geological and drilling method using 3D seismic data,combined with a variety of original data and analysis data and re processing of Changde gas field,using the method of well seismic combination,the lithology,lithofacies and distribution characteristics of Changde gas field,find out the reservoir lithology and physical property and the characteristics of sedimentary microfacies,the last comprehensive evaluation of reservoir.The following conclusions are obtained in this paper:No.1.Changde gas field of Yingcheng Formation of a reservoir rock types are mainly volcano rocks,volcano clastic rocks can be divided into 2 categories,8 small classes in accordance with the principle of classification,the volcano clastic rocks of rhyolite most other species development,no development in the area.In the volcano clastic rock,tuff,crystal tuff,tuff breccia of natural gas is the main reservoir rock.No.2.Study on sedimentary facies of Yingcheng formation is relatively simple,mainly developed fan delta facies,a development of volcano sedimentary facies of fluvial facies,and river facies,fan delta front subfacies and volcano rock burst facies is the most favorable reservoir facies belt.No.3.Camp a volcano rock reservoir pore structure is divided into three types:type I(coarse state)and II(thin state),III(fine state),with class II,50% of the total number of samples,the second class III,class I a small proportion of the total sample number 10%.No.4.The relationship between lithology and physical property indicates that the volcanic rocks in the first stage of the camp are the best in the best physical properties of the tuff,and the second is the crystal tuff.No.5.The study of reservoir physical properties shows that the effective porosity of the first stage volcanic reservoir is 0.4 to 8.8%,and the total permeability is from 0.001 to 0.77 m D.The physical property of the well,the well of the well in the deep well of the well,is the best,and the variation of the north is worse than that of the north in the deep well of the 701 well.No.6.The main diagenesis types of volcanic rocks are condensation shrinkage,ceme ntation,filling and metasomatism,and cementation and filling are the main diagenesis.Weak dissolution is the main factor to improve the reservoir.No.7.Reservoir development is mainly controlled by lithology,lithofacies,Cheng Yan and tectonism.The main controlling factors of reservoir development are different.The main controlling factors of dissolution and fracture are the microtek tuff and the tuff reservoir.